[sal~src:11] Creation of log actor

[therealbean@kenai.com]

Project:    sal
Repository: src
Revision:   11
Author:     therealbean
Date:       2009-11-21 07:40:13 UTC
Link:       

Log Message:
------------
Creation of log actor


Revisions:
----------
11


Added Paths:
------------
org/pz/sal/commonActors/log.java


Diffs:
------
Index: org/pz/sal/commonActors/log.java
===================================================================
--- org/pz/sal/commonActors/log.java    (revision 0)
+++ org/pz/sal/commonActors/log.java    (revision 11)
@@ -0,0 +1,83 @@
+/***
+ *  Sal: Simple Actor Library (available free at sal.pz.org)
+ *
+ *  Sal is (c) Copyright 2009 Pacific Data Works LLC. All Rights Reserved.
+ *  Licensed under Apache License 2.0 
(http://www.apache.org/licenses/LICENSE-2.0.html)
+ */
+
+package org.pz.sal.commonActors;
+
+import org.pz.sal.*;
+
+import java.io.*;
+
+/**
+ * Simple actor that logs strings to a log file or stdout
+ *
+ * @author alb
+ */
+public class log extends Actor
+{
+    private File logfile = null;
+    private BufferedWriter writer = null;
+
+    public log( final String assignedName )
+    {
+        super( assignedName );
+    }
+
+    @Override
+    public void processMessage( final Object o )
+    {
+        assert( o != null );
+
+        String msg;
+
+        if( o instanceof String ) {
+            processString( (String) o );
+        }
+        else
+        if ( o instanceof File ) {
+            setupLogfile( (File) o );
+
+        }
+    }
+
+    private void setupLogfile( final File f )
+    {
+        try {
+            writer = new BufferedWriter(new FileWriter( logfile ));
+        }
+        catch( IOException ioe ) {
+            logfile = null;
+        }
+    }
+
+    private void processString( final String string )
+    {
+        if( string.isEmpty() ) {
+            return;
+        }
+
+        if( string.equals( Commands.SHUTDOWN )) {
+            super.shutdown();
+            return;
+        }
+
+        if( logfile == null ) {
+            System.out.println( string );
+        }
+        else {
+            try {
+                writer.write( string + "\n" );
+            }
+            catch( IOException ioe ) {
+                logfile = null;
+                processString( "Error writing to logfile. Closing logfile." 
);
+                processString( string ); //>>>> need to close file
+            }
+        }
+    }
+}
+
+